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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter 2 Cards Specifications
2.2.4 Optical Amplifiers
• Full monitoring and alarm handling capability with settable thresholds
• Supported optical safety functionality by signal loss detection and alarm, fast power down control,
and reduced maximum output power in safe power mode
The OPT-BST-L card implements the following optical safety functions:
• Optical Safety Remote Interlock (OSRI)
• Automatic Laser Shutdown (ALS)
The OSRI function provides hardware and software capability for shutting down or reducing the output
optical power to a safer level, whereas the ALS function provides a safety mechanism (automatic power
reduction [APR]) for fiber cuts.
Table 2-25 defines all power and gain specifications for OPT-BST-L card:
Figure 2-8 shows the standard and extended gain range for the OPT-BST-L card. Red lines indicate the
total measurement range accomplished by the photodiodes.
Figure 2-8 OPT-BST-L Card Standard and Extended Gain Range
Table 2-25 OPT-BST-L Card Power and Gain Specifications
Parameter Comment Min Typical Max Unit
Operative input power range Full channel load –10 — 9 dBm
Single channel –37 — –18 dBm
Maximum total output
power
FW or HW limited — — 17.5 dBm
Signal output power range Full channel load — — 17 dBm
Single channel –10 — dBm
Standard gain range Controllable gain tilt 8 — 20 dB
Extended gain range Gain tilt uncontrolled 20 — 27 dB
